14(3y + 5z)*3+7(3 y-5z)*2
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14(3y + 5z)*3+7(3 y-5z)*2
(42y+70z)3+(21y-35z)2
126y+210z+42y-70z
168y+140z or
28(6y+5z)
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Step-by-step explanation:
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